Forget the polls and fundraising reports for a minute. Our pundits, Matt Dickinson and Bert Johnson, say the forthcoming GDP report may be the most important factor in the presidential campaign so far — especially now that the Republican primary seems to be winding down and attention turning to the general election. In their latest update on presidential campaign politics, the pundits discuss GDP, the Supreme Court, and why President Obama would show up in Vermont (the first presidential visit here since 1995).